Issue in base height expression (ArcGIS Pro)

I am setting base height expression in ArcScene and I am trying to publish the SXD in web using ArcGIS Pro it throws error that "invalid expression", even though the SQL expression validator doesn't through error. Kindly let me know how to solve this issue. For your reference I am attaching the screenshot of the expression which I set in ArcScene.

did you type that expression? or did you use the calculator to select the Z field, the multiply and the 10? I thought python was now used in Pro so I am surprised if the field isn't enclosed in double exclamation marks (ie !Z! * 10 )

Sorry for the confusion I am sending the updated screenshot with issues.

Issue:

I need to publish the SXD data in web for that I have used ArcGIS Pro 1.4 by setting the elevation as shown in the attached screenshot (using field "Baseheigth" , Field value also shown the screenshot) . While publishing we got the error "Layer uses an unsupported elevation setting".

Thanks for the reply , the reason behind the negative values is that,the data which I have is borehole data. I need to render the points underneath of the surface. I am wonder it is accepting in ArcScene but not i ArcGIS Pro.

strange... the only other option I could suggest is converting it from a polygonz to a polygon file with the calculation done within the table and see whether the 'a field' or 'and expression' works in that scenario.